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JEE Main 2023 · 24 Jan · Shift 1 · Paper-1(B.E./B. Tech.)

JEE Main 2023 Chemistry question on Hydrogen and s-Block Elements

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by

A. Liquid water
B. Ice
C. Impure water

Choose the correct answer from the options given below:
  1. A.
    A>B>CA > B > C
  2. B.
    C>B>AC > B > A
  3. C.
    A=B>CA = B > C
  4. D.
    B>A>CB > A > C
Show answer and solution

Correct option: D

Solution

Ice has a perfect, fully hydrogen-bonded tetrahedral network where every water molecule forms exactly 4 H-bonds in a rigid, ordered crystal lattice — this is the maximum possible H-bonding. Liquid water has slightly fewer and more transient H-bonds (~3.4 per molecule on average) due to thermal motion breaking some bonds. Impure water has dissolved solutes (ions or other species) that disrupt the H-bond network, reducing it the most. Hence the order is Ice > Liquid water > Impure water, i.e., B > A > C.

[JEE Main 2023 · 24 Jan · Shift 1 · Paper-1(B.E./B. Tech.)]

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